RT info:eu-repo/semantics/article
T1 Corrosion resistance of ZrTi alloys with hydroxyapatite-zirconia silver layer in simulated physiological solution containing proteins for biomaterial applications
A1 Souto, Ricardo Manuel
A1 Mareci, Daniel
A1 Trincă, Lucia Carmen
A1 Căilean, D.
K1 ZrTi alloys
K1 HA–ZrO2-Ag nanoparticles
K1 pulsed laser deposition
K1 EIS
K1 SEM
AB The degradation characteristics of hydroxyapatite-zirconia-silver films (HA-ZrO2-Ag) coatings on three ZrTi alloys were investigated in Ringer’s solution containing 10% human albumin protein at 37 °C. Samples were immersed for 7 days while monitored by electrochemical impedance spectroscopy (EIS) and linear potentiodynamic polarization (LPP). The electrochemical analysis in combination with surface analytical characterization by scanning electron microscopy (SEM/EDX) reveals the stability and corrosion resistance of the HA–ZrO2-Ag coated ZrTi alloys. The characteristic feature that describes the electrochemical behaviour of the coated alloys is the coexistence of large areas of the coating presenting pores in which the ZrTi alloy substrate is exposed to the simulated physiological environment. The EIS interpretation of results was thus performed using a two-layer model of the surface film. The blocking effect in the presence the human albumin protein produces an enhancement of the corrosion resistance. The results disclose that the Zr45Ti alloy is a promising material for biomedical devices, since electrochemical stability is directly associated to biocompatibility
YR 2016
FD 2016
LK http://riull.ull.es/xmlui/handle/915/19054
UL http://riull.ull.es/xmlui/handle/915/19054
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-abr-2024